[Xen-devel] [PATCH] [Xen 3.3] Containing MSI errors in msi emulation code in QEMU

["Haitao Shan" <maillists.shan@xxxxxxxxx>]

Sorry, forgot the patch in my last mail.


---------- Forwarded message ----------
From: Shan, Haitao <haitao.shan@xxxxxxxxx>
Date: 2008/11/12
Subject: [Xen-devel] [PATCH] [Xen 3.3] Containing MSI errors in msi
emulation code in QEMU
To: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
抄送： "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>


Hi, Keir,

We found one problem related to MSI in Xen 3.3. If msi=0 is specified
and guest want to enable msi, qemu finds it can not enable it and
quits. This problem is not appicable for xen unstable since the
"msi=x" switch is removed.
My patch let these cases be handled inside msi emulation code. If qemu
can not enable msi, guest will not receive MSI. But Qemu can still go
on. But if guest driver does not test MSI's functionality, guest
device will stop to function.
Could you please apply the patch?

Best Regards
Haitao Shan

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